Concrete bar



April 16, 1929. v 5 RQG'QW 1,709,441

CONCRETE BAR Filed July 18, 1925 2 Sheets-Sheet l J l J l BY ATTORNEY April 16, 1929. s. ROGOW 1,709,441

CONCRETE BAR Filed July 18, 1923 2 Sheets-Sheet 2 A TTORNE Y INVEN TOR Patented Apr. 16, 1929.

UNITED STATES SYDNEY ROGOW, OF NEW YORK, N. Y.

CONCRETE BAR.

Application filed July 18,

economy of time and labor in the assemblage and installation.

In the erection and installation of parts such as floors and columns of a building composed wholly or in part of concrete ma terials, it is customary to use metal bars as reinforcements for the concrete, and to install or lay such bars by manual labor and to tie the bars one to the other in series prior to pouring the concrete, all of which operations involve a serious loss of time and the expenditure of labor some of which is devoted to picking bars of the size appropriate to the particular installation from a mass or pile of bars or rods which vary in size or dimensions and are commonly dumped in a mingled condition in a pile close to the o 1 According to this invention the bars or rods for a particular part of the concrete installation, such as a floor or column, are assembled, at a fabricating plant or rolling mill, in the required spaced relation and such bars are fastened by ties composed of flexible wire, or its equivalent, after which the bars and the ties are rolled into a compact bundle and fastened together, in which condition the mass is handled and transported with ease and facility so that the bundle reaches the place of installation in a condition ready for immediate use, for the reason that the bundle of rods can readily be unrolled and at once installed as a part of the concrete construction, thereby attaining economy of time and labor.

A further feature of the invention consists in the provision of means for identifying the rods, and a still further feature consists of utilizing the flexible ties as a means for spacing the bars or rods from the mold or form when installing the rods so that the concrete material is free to pass below the rods or between the rods and the form in order to bond the concrete and the rods into a homogeneous mass.

My invention is capable of use in bars for use in floors and columns, said bars being either straight rods or bent rods, and it is available for use, also, in the so-called mats 1923. Serial No. 652,228.

to be installed in conjunction with columns and floors.

Other functions and advantages of the invention will appear from the following description taken in connection with the drawings, wherein- Figure l is a perspective view of a rolled bundle composed of straight rods tied in accordance with my invention.

Figure 2 is a plan View of a series of rods and flexible ties therefor.

Figure 3 is a perspective view illustrating the installation of the bundled rods in a concrete column.

Figure 4 is a perspective view illustrating one form of tie adapted to serve the function of a spacer for positioning a series of rods with respect to a form or mold.

Figures 5 and 6 illustrate bent rods tied by flexible wires and compacted into bundles according to this invention.

Figure 7 is a plan view illustrating a mat composed of two series of rods, each of which series of rods is tied by flexible wires according to the invention.

In the embodiment illustrated in Figures 1, 2 and 3, A is a series of rods or bars and B are flexible ties therefor. The rods or bars are assembled in parallel order and spaced at the required intervals as in Figure 2. The ties B are composed of wires, or equivalent material, and these ties are placed crosswise of the rods or bars, at appropriate intervals, said ties being united in a desired manner to the rods. The ties may be twisted around the bars, or the union may be efl'ected by welding the wires and rods, as at a, such as by the electric spot welding process.

'lhe assembling of the bars and the ties, and the union thereof, is carried on to best advantage at a rolling mill or fabricating plant, and at this time the bars and the ties are selected according to the plans and specification of the building in which the rods are used, or standard sized bars and Wires may be used. \Vhen thus assembled and united, the rods and ties are compacted into a bundle by rolling the mass into a cylindrical roll, as in Figure 1, and thereafter the free protruding ends .7) of the ties B are secured as by twisting said ends of each tie to form a knot whereby the ties not only couple the bars in the required relation. but said ties also afford a convenient means for securely fastening the bundle of rods in order to hold the bundle intact when handled, stored or shipped.

For installing the rods in a floor construction, the tie wires are cut at the twisted parts and the bundle is unrolled so as to assume the flat condition shown in Figure 2, in which unroiled or flattened condition the rods and the tie wires are installed as a unit and the floor is ready for the concrete material. This method of installing the rods, econoinizes in the time and labor ordinarily required to select the rods of appropriate size from a pile, to lay the rods with more or less accuracy, and to tie the ends together by Wires.

For convenience in identifying the bundle of rods, the ties may be flat bands instead of wires, and one end of a tie band may be allowed to protrude so that the protruding end serves the function of a tag on which is inscribed in a desired manner any data appropriate for the particular bundle or job.

It is desirable when laying or installing the rods in a floor to spare the rods relatively to the form or mold, and one part of my invention consists in the formation of the tie wires 13 to function as spacers for the rods. To this nd, the tie wire B may be, and desirably, is, provided with a succession of bends or loops C, as shown in Figure 4. The tie wires are attached in a desirable manner to the rods, and said rods and ties are rolled into a bundle as described, ready for handling, storage and shipment. hen ready for installation, the bundle is unrolled. and flattened. and laid as a unit upon the mold or form, the loops or bends C of the tie Wires being in contact With the form so as to raise the rods free from contact with the form and to support the rods in said raised position, thus allowing sufficient space to intervene the rods and the form for the entry of concrete.

The bundle of rods may be used, also, in the formation of a column, as depicted in Figure 3. The bundles are unrolled in their proper positions and the wires 15 are fastened, after which additional wires, as I), may be tied around the installed rods to assist in supporting the rods in the required fixed positions during the pouring of the concrete.

In the formation of a column, the metal bars are fastened to annular ties, such as B, or to spirals, the same being left in po sition.

It will be understood that the bars are united to the ties, and when the unitary structure is to be stored or shipped, the same is collapsed by coiling it. Upon reaching its destination. the structure is then opened to the required extent and fastened to spacer bars, and then the vertical column bars are fastened to a spiral. If desired, the spirals before. collapsing can have the flexible ties welded thereto, so as to be collapsed as a unit, but when ready for installation, the unitary structure is opened, the ties assuming the proper spiral pitch and wired to the vertical column bars, thereby eliminating the expensive separate spacers sometimes employed.

In molding piles, a core D is positioned centrally inthe outside mold or form, and the unitary bars and ties positioned around the core as in Figure 3.

As heretofore described, the rods are straight bars disposed in parallel order and tied by wires adapted to be rolled into cylindrical form, but in Figures 5 and 6 I have shown the method as applied to bent rods or bars A. Thus in Figure 5, the rods A are bent at their ends as at (I, and tie Wires B are attached to said rods and the ends (1 thereof to retain said rods in the required parallel relation. These tie Wires are adapted to be distorted or buckled in compacting the bent rods into a bundle, but previous to laying the rods in a floor, they are drawn apart to the extent permitted by the wires, the latter being thus straightened or partly straightened for retaining the rods in the required parallel relations prior to pouing the concrete.

Figure 6 shows a bundle composed of straight rods A and bent rods A in alternate order. together with tie wires B fastened to the rods A A and uniting them in series for installation as a unit, said tie wires being useful in holding the rods when bundled in the required compact order for bundling, storage and shipment.

It is apparent that the wires B of Figure 5 and the wires B of Figure 6 are sufficiently long to pass around the bundle of rods and to be secured for holding the rods in a compact bundle. Also, that the Wires B of Figure 5 and B of Figure 6 are or may be provided with the spacer bends or loops C similar to Figure 4.

The principle of my invention is useful, also, in the formation of a grillage or mat adapted for reinforcing the concrete at the juncture of a floor or footing and a column. One form of grillage or mat is shown in Figure 7, wherein a series of rods F are joined by the wires F, and a second series of rods G are joined by tie Wires G. The rods F and tie wires F are assembled and attached at the required intervals at the fabricating plant, and rolled into a bundle. Similarly, the rods G and ties G are spaced and fastened together at the plant, and also rolled into a bundle; if desired, the two series of rods F G with their ties may be rolled into the same bundle, all the rods being parallel. To install the grill-age, the

bundle or bundles are unrolled and flattened, and the rods of one series are laid in position, whereas the rods of the other series are positioned crosswise of the first series and laid above the same, so that the rods of the two series are in crossing relation to form the desired mat or grillage.

Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent is:

As an article of manufacture, a concrete reinforcing mat embodying a series of bars positioned in side by side relation, a plurality of tie wires fixedly attached to said bars at intervals intermediate the ends thereof and operating to connect said bars and to retain the same in the required parallel relation, said tie wires in the unfolded condition of the mat lying in substantially the plane of said bars and said tie wires being ot a flexible nature whereby the mat as a unit may be collapsed or folded into a compact bundle and said mat may be spread out with the bars in a separated relation While being joined by said tie wires, and spacer loops unitary with the tie wires in the intervals between the bars, said spacer loops extending from the tie wires and in the spread out condition of the mat, said spacer loops occupying :1 depending position relatively to the plane of said mat.

In testimony whereof I have hereto signed my name this 29 day of June, 1923.

SYDNEY ROGOW. 

